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1.stranded resistance values of motors? 2.how to calculate the resistance values of single phase and 3phase motors?
2 7102if transformer winding burn on dc supply then why not alternator rotor winding please post answer on y.sakhare@rediffmail.com
4 10020If a Power Transformer Fails and the transformer manufacturer suggest that "Do all electrical test on the transformer?". What are the test to be conducted in this condition?
5 7523in the thermal power plant, why we use the condenser (for cooling the steam) when we have to heat the steam again. i mean why we are cooling the steam,
6 10659what's the meaning of the negative going half cycle in the circuit containing a bulb and a switch in series with a input ac source. i mean what happens in the -ve cycle. the dir. of current changes or any other thing. if dir. changes then why we use fuse in only phase wire.
2 5468I have 30KW Motor Starter Panel, System voltage is 480V, So i have to convert voltage 480 to 220V to give the contactor coil. How i can select control transformer, Which rating transformer i can use this panel, what is the procedure, please tell me.
2 5619Post New Electrical Engineering Questions
We have two parts in generator, electrical & mechanical. how it works?
In radial network the source is fed from 1 end both ends at central
what will be the maximum winding temperature of 6.6kv HT motor 450kw, Full load current 49A. 50Hz Frequency.
1. What is differential relay? How it operates? 2.How to calculate the Short Circuit Impedance in Transformer? 3.What is the alternate solution for testing of polarity by using polarity tester while its milli ammeter does not works? 4. While testing the 33KV Busbar by using Hipot kit, what should be the test voltage we have to apply? 5. What is the procedure/activities to be taken to inject the current more than 2000A by using 2000A Loading Transformer? 6. Explain how you can give the overload setting to any Motor Protection Relay for a HT motors with formula and example? 7. Why restricted earth fault protection is needed? Why can’t differential Protection is sufficient? 8. What should be the minimum and maximum ohmic value for earthing? 9. Why DC Currents are not used in transformer? 10. What is the Frequency while we step up the voltage from 220V to 11KV? Is it possible? Explain it?
how a resistor resists to flow the current?how an inductor oppses the sudden change in current?how a capacitor opposes a DC voltage.
what is the earth current,reverse power,electrical trip generator short circuit,low voltage, high voltage please discribe me
What are the advantages & disadvantages of a group electrive drive?
why starting current is high and resistance is almost 0 during the starting of motor dc motor...?
what is the necessity of under ground cables ??
why Current is lead 90 degree and voltage is lag 90 degree in a capacitor.? why Current is lag 90 degree and voltage is lead 90 degree in an inductor.?
What is the efficiency during maximum power transfer?
how many types control panel of a 132/33 kv substation
Should power factor be low or high?
Damping resistor provided in open delta (tartiary) winding of a measuring PT at the incoming of a MV inverter drive panel is getting heated up. Can any body explain the reasons and suggest the remedy?
Difference between earthing & grounding.?
